So even if she studies quite intensively (e.g. for two whole days before an exam), the results are poor, because she forgets 90% of the things she learned within a month.

• 所以即使非常集中地学习（例如：在考试前复习整整两天的时间），结果很不理想，因为她忘掉了一个月之内所学习的百分之九十的东西。